#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;

int square(int x)
{
	return x * x;
}
float square(float x)
{
	return x * x;
}
double square(double x=1.5)
{
	return x * x;
}
int main()
{
	cout << "square()=" << square() << endl;
	cout << "square(10)=" << square(10) << endl;
	cout << "square(2.5f)=" << square(2.5f) << endl;
	cout << "square(1.1)=" << square(1.1) << endl;
	return 0;
}